| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an apparatus for audio data processing that easily mixes sound source data and real audio data in one circuit. <P>SOLUTION: A BBR decoder 53 decodes 4-bit ADPCM data, a pitch conversion section 54 makes pitch conversion, and an envelope generator 58 makes envelope conversion. Then audio outputs of left and right channels which are outputted after sound volume is controlled by variable resistors 60L and 60R are added by an adder 62 to 16-bit PCM data whose volume is controlled by a mixing variable resistor 65. A reverberation processing section 68 performs reverberation processing of the audio data from the mixing variable resistor 65 or the addition output of an adder 67 which adds the audio data to the audio data from the variable resistors 60L and 60R, and the audio data whose volume is controlled by a reverberation variable resistor 69, and the audio data from the adder 62 are added together. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
